EP0177005A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Eye examining apparatus
Assignee: Topcon Corp
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Filing: 1985-09-30
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Granted: —
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Expires: 2005-09-30
Abstract
Abstract An eye examining apparatus is disclosed which is capable of the accurate detection of any abnormality in the optical system of a patient's eye which might exist at any position of the eye, and also which is capable of providing easy measurement of the degree of refration of the patient's eye. The apparatus comprises a target projecting system for projecting onto a retina a target image to be measured; focalizing means for detecting the focus of the target to be measured and for focalizing it on the retina: and an optical transfer function measuring system for detecting the contrast of the target image to be measured, which is focalized on the retina, and thereby measuring the optical transfer function of the patient's eye.The apparatus may further comprise means for comparing the measured optical transfer function with that of a normal eye, and the target projecting system may include a means for rotating the target image to be measured around an optical axis.
Inventors
- 👤 Shinji Wada
- 👤 Katsuhiko Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 19:09
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/12
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
119 words
An eye examining apparatus comprising: a target projecting system which has a target to be measured and which projects the image of said target to be measured onto the retina of a patient's eye; focalizing means for detecting the focus of the target image on said retina of said patient's eye and for focalizing said target image on said retina; and an optical transfer function measurement system for 1 detecting the contrast of said target image from a signal output from a photoelectric detector and for measuring the optical transfer function of said patient's eye. said optical transfer measurement system including an optical image-forming system for projecting said target image focalized by said focalizing means onto said photoelectric detector.
Claim 2
Dependent Claim
119 words
An eye examining apparatus comprising: a target projecting system which has a target to be measured and which projects the image of said target to be measured onto the retina of a patient's eye; focalizing means for detecting the focus of the target image on said retina of said patient's eye and for focalizing said target image on said retina; and an optical transfer function measurement system for 1 detecting the contrast of said target image from a signal output from a photoelectric detector and for measuring the optical transfer function of said patient's eye. said optical transfer measurement system including an optical image-forming system for projecting said target image focalized by said focalizing means onto said photoelectric detector.
Claim 3
Dependent Claim
24 words
An eye examining apparatus according to claim 1, wherein said target projecting system includes means for rotating said target image around an optical axis.
Claim 4
Dependent Claim
30 words
An eye examining apparatus according to claim 1, wherein said optical transfer function measurement system includes means for comparing a measured optical transfer function with that of a normal eye.
Claim 5
Dependent Claim
15 words
An eye examining apparatus according to claim 1, wherein said detector is a camera tube.
Claim 6
Dependent Claim
15 words
An eye examining apparatus according to claim 1, wherein said detector is a two-dimensional array.
Claim 7
Dependent Claim
15 words
An eye examining apparatus according to claim 1,. wherein said detector is a one-dimensional array.
Claim 8
Dependent Claim
18 words
An eye examining apparatus according to claim 1, wherein said target to be measured is an edge pattern.
Claim 9
Dependent Claim
18 words
An eye examining apparatus according to claim 1, wherein said target to be measured is a slit pattern.
Claim 10
Dependent Claim
18 words
An eye examining apparatus according to claim 1, wherein said target to be measured is a lattice pattern.
Claim 11
Dependent Claim
18 words
An eye examining apparatus according to claim 1, wherein said target to be measured is a sine-wave pattern.
Claim 12
Dependent Claim
17 words
An eye examining apparatus according to claim 9, wherein the frequency of said lattice pattern continuously changes.
Claim 13
Dependent Claim
17 words
An eye examining apparatus according to claim 10, wherein the frequency of said sine-wave pattern continuously changes.
Claim 14
Dependent Claim
95 words
An eye examining apparatus comprising: a target projecting system which has a target to be measured and which projects the image of said target to be measured onto the retina of a patient's eye; a refraction power measurement system for detecting the focus of the target image on said retina of said patient's eye and measuring the degree of refraction of said patient's eye; and an optical transfer function measurement system for photoelectrically detecting the contrast of said target image focalized on said retinal and for measuring the optical transfer function of said patient's eye.
Claim 15
Dependent Claim
95 words
An eye examining apparatus comprising: a target projecting system which has a target to be measured and which projects the image of said target to be measured onto the retina of a patient's eye; a refraction power measurement system for detecting the focus of the target image on said retina of said patient's eye and measuring the degree of refraction of said patient's eye; and an optical transfer function measurement system for photoelectrically detecting the contrast of said target image focalized on said retinal and for measuring the optical transfer function of said patient's eye.
Claim 16
Dependent Claim
34 words
An eye examining apparatus according to claim 13, wherein said target to be measured is composed of a target for detecting the degree of refraction and a target for detecting the axis of astigmatism.
Claim 17
Dependent Claim
42 words
An eye examining apparatus according to claim 13, wherein said target to be measured is composed of a target for detecting the degree of refraction, a target for detecting the axis of astigmatism, and a target for measuring the optical transfer function.
Claim 18
Dependent Claim
24 words
An eye examining apparatus according to claim 13, wherein said target projecting system includes means for rotating the target image around an optical axis.
Claim 19
Dependent Claim
30 words
An eye examining apparatus according to claim 13, wherein said optical transfer function measurement system includes means for comparing a measured optical transfer function with that of a normal eye.
References Cited (Backward Citations)
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